Peter Todd
Consultant
Old Toronto, Ontario, Canada
Summary
🤩
RockstarPeter Todd is an applied cryptography consultant with 18 years of hands-on experience building and hardening Bitcoin and cryptocurrency infrastructure from Old Toronto. He’s a pragmatic back-end engineer known for improving security, transaction validation, and protocol correctness across flagship projects like Bitcoin Core, rust-bitcoin, Zcash, Litecoin, Dogecoin and Python Bitcoin libraries. His contributions skew toward low-level protocol fixes, rigorous test coverage, and defensive engineering—patching vulnerabilities, tightening script/transaction handling, and adding RPC features to aid operability. Comfortable in Rust, C++ and Python, he blends deep protocol knowledge with a maintainer’s focus on code quality and backward-compatible improvements. An understated strength is his eye for small, high-leverage fixes (spellings, test hardening, bloom filter refactors) that reduce accidental regressions and improve long-term project health.
18 years of coding experience
Stackoverflow
1reputation
68reached
0answers
2questions
Github Skills (40)
wallet10
c-language10
python10
back-end-development10
scripting10
testing10
bitcoin10
bitcoins10
cryptocurrencies10
dog10
data-structure10
bitcoin-core10
security10
cryptocurrency10
privacy10
Programming languages (21)
Github contributions (5)
petertodd/python-bitcoinlib
Aug 2013 - Jan 2023
Python3 library providing an easy interface to the Bitcoin data structures and protocol.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 2 reviews, 349 commits in 9 years 6 months
Contributions summary:Peter primarily contributed to the core functionality of the Python3 bitcoin library, focusing on low-level Bitcoin data structures and protocol implementations. They significantly enhanced the library by pythonizing the CScript class, enabling more flexible and Pythonic usage of Bitcoin script operations. The user also added unit tests for the EvalScript function, improving the testing coverage, and implemented support for Segregated Witness features, reflecting a strong understanding of Bitcoin protocol details and coding practices. Furthermore, they are familiar with the BIP143 implementation and test vectors.
bitcoindata-structuredata-structurespython
litecoin-project/litecoin
Apr 2012 - Jun 2015
Litecoin source tree
Role in this project:Back-end Developer
Back-end DeveloperContributions:19 commits in 3 years 2 months
Contributions summary:Peter primarily contributed to fixing and improving the core functionality of the Litecoin project. Their work involved addressing specific bugs, such as incorrect error messages in multisig address creation and inaccurate display of transaction lock times. They also added new features, like the "getinfo" RPC call, providing the time difference between the network and the local system. Furthermore, the user improved the codebase by adding new RPC calls such as "decodescript," and implemented several improvements to the validation logic of transactions, particularly concerning security and preventing denial-of-service attacks.
litecoincryptocurrency
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